NAICS Sector 21

Sector 21

NAICS Sector 21: Mining, Quarrying, and Oil and Gas Extraction

Definition of NAICS Sector 21: The Mining, Quarrying, and Oil and Gas Extraction sector comprises establishments that extract naturally occurring mineral solids, such as coal and ores; liquid minerals, such as crude petroleum; and gases, such as natural gas. The term mining is used in the broad sense to include quarrying, well operations, beneficiating (e.g., crushing, screening, washing, and flotation), and other preparation customarily performed at the mine site, or as a part of mining activity.

NAICS 21The Mining, Quarrying, and Oil and Gas Extraction sector distinguishes two basic activities: mine operation and mining support activities. Mine operation includes establishments operating mines, quarries, or oil and gas wells on their own account or for others on a contract or fee basis. Mining support activities include establishments that perform exploration (except geophysical surveying) and/or other mining services on a contract or fee basis (except mine site preparation and construction of oil/gas pipelines).

Establishments in the Mining, Quarrying, and Oil and Gas Extraction sector are grouped and classified according to the natural resource mined or to be mined. Industries include establishments that develop the mine site, extract the natural resources, and/or those that beneficiate (i.e., prepare) the mineral mined. Beneficiation is the process whereby the extracted material is reduced to particles that can be separated into mineral and waste, the former suitable for further processing or direct use. The operations that take place in beneficiation are primarily mechanical, such as grinding, washing, magnetic separation, and centrifugal separation. In contrast, manufacturing operations primarily use chemical and electrochemical processes, such as electrolysis and distillation. However, some treatments, such as heat treatments, take place in both the beneficiation and the manufacturing (i.e., smelting/refining) stages. The range of preparation activities varies by mineral and the purity of any given ore deposit. While some minerals, such as petroleum and natural gas, require little or no preparation, others are washed and screened, while yet others, such as gold and silver, can be transformed into bullion before leaving the mine site.

Mining, beneficiating, and manufacturing activities often occur in a single location. Separate receipts will be collected for these activities whenever possible. When receipts cannot be broken out between mining and manufacturing, establishments that mine or quarry nonmetallic minerals, and then beneficiate the nonmetallic minerals into more finished manufactured products are classified based on the primary activity of the establishment. A mine that manufactures a small amount of finished products will be classified in Sector 21, Mining, Quarrying, and Oil and Gas Extraction. An establishment that mines whose primary output is a more finished manufactured product will be classified in Sector 31-33, Manufacturing.

Two Digit Sector 21 Breakdown for the North American Industry Classification System

NAICS codes are broken down by digit. The broadest description starts with the 2 digit sector codes. The 3 digit subsector codes are more specific, then the 4 digit industry group, 5 digit industry, and the most specific is the 6 digit NAICS code. If NAICS Sector 21 does not describe the industry of the business in question, then select the largest applicable code below. From there, follow the progression of smaller digits to the larger digits in order to obtain the most specific 6 digit classification.

  • Sector 21: Mining, Quarrying, and Oil and Gas Extraction
    • Subsector 211: Oil and Gas Extraction
      • Industry Group 2111: Oil and Gas Extraction
        • Industry 21111: Oil and Gas Extraction
          • 6 Digit Code(s) NAICS 211111: Crude Petroleum and Natural Gas Extraction
          • 6 Digit Code(s) NAICS 211112: Natural Gas Liquid Extraction
    • Subsector 212: Mining (except Oil and Gas)
      • Industry Group 2121: Coal Mining
        • Industry 21211: Coal Mining
          • 6 Digit Code(s) NAICS 212111: Bituminous Coal and Lignite Surface Mining
          • 6 Digit Code(s) NAICS 212112: Bituminous Coal Underground Mining
          • 6 Digit Code(s) NAICS 212113: Anthracite Mining
      • Industry Group 2122: Metal Ore Mining
        • Industry 21221: Iron Ore Mining
          • 6 Digit Code(s) NAICS 212210: Iron Ore Mining
        • Industry 21222: Gold Ore and Silver Ore Mining
          • 6 Digit Code(s) NAICS 212221: Gold Ore Mining
          • 6 Digit Code(s) NAICS 212222: Silver Ore Mining
        • Industry 21223: Copper, Nickel, Lead, and Zinc Mining
          • 6 Digit Code(s) NAICS 212231: Lead Ore and Zinc Ore Mining
          • 6 Digit Code(s) NAICS 212234: Copper Ore and Nickel Ore Mining
        • Industry 21229: Other Metal Ore Mining
          • 6 Digit Code(s) NAICS 212291: Uranium-Radium-Vanadium Ore Mining
          • 6 Digit Code(s) NAICS 212299: All Other Metal Ore Mining
      • Industry Group 2123: Nonmetallic Mineral Mining and Quarrying
        • Industry 21231: Stone Mining and Quarrying
          • 6 Digit Code(s) NAICS 212311: Dimension Stone Mining and Quarrying
          • 6 Digit Code(s) NAICS 212312: Crushed and Broken Limestone Mining and Quarrying
          • 6 Digit Code(s) NAICS 212313: Crushed and Broken Granite Mining and Quarrying
          • 6 Digit Code(s) NAICS 212319: Other Crushed and Broken Stone Mining and Quarrying
        • Industry 21232: Sand, Gravel, Clay, and Ceramic and Refractory Minerals Mining and Quarrying
          • 6 Digit Code(s) NAICS 212321: Construction Sand and Gravel Mining
          • 6 Digit Code(s) NAICS 212322: Industrial Sand Mining
          • 6 Digit Code(s) NAICS 212324: Kaolin and Ball Clay Mining
          • 6 Digit Code(s) NAICS 212325: Clay and Ceramic and Refractory Minerals Mining
        • Industry 21239: Other Nonmetallic Mineral Mining and Quarrying
          • 6 Digit Code(s) NAICS 212391: Potash, Soda, and Borate Mineral Mining
          • 6 Digit Code(s) NAICS 212392: Phosphate Rock Mining
          • 6 Digit Code(s) NAICS 212393: Other Chemical and Fertilizer Mineral Mining
          • 6 Digit Code(s) NAICS 212399: All Other Nonmetallic Mineral Mining
    • Subsector 213: Support Activities for Mining
      • Industry Group 2131: Support Activities for Mining
        • Industry 21311: Support Activities for Mining
          • 6 Digit Code(s) NAICS 213111: Drilling Oil and Gas Wells
          • 6 Digit Code(s) NAICS 213112: Support Activities for Oil and Gas Operations
          • 6 Digit Code(s) NAICS 213113: Support Activities for Coal Mining
          • 6 Digit Code(s) NAICS 213114: Support Activities for Metal Mining
          • 6 Digit Code(s) NAICS 213115: Support Activities for Nonmetallic Minerals (except Fuels) Mining

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NAICS Sector 21